An image transmission system enabling a user to recognize a communication status between a PC and a projector, and including a PC (300) as an image generating apparatus and a projector (400) as an image projecting apparatus. The projector (400) monitors a status of communication with the PC (300), and includes a status monitoring unit (402) generating information related to the communication status being monitored, and also a projector communication unit transmitting the generated information related to the communication status to the PC (300). The PC (300) includes a PC communication unit (301) receiving information related to the communication status from the projector (400), a beacon analyzing unit (302) analyzing the received information and a display output unit (303) displaying a result of the analysis by the beacon analyzing unit (302).